/**
 * openHAB, the open Home Automation Bus.
 * Copyright (C) 2010-2012, openHAB.org <admin@openhab.org>
 *
 * See the contributors.txt file in the distribution for a
 * full listing of individual contributors.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses>.
 *
 * Additional permission under GNU GPL version 3 section 7
 *
 * If you modify this Program, or any covered work, by linking or
 * combining it with Eclipse (or a modified version of that library),
 * containing parts covered by the terms of the Eclipse Public License
 * (EPL), the licensors of this Program grant you additional permission
 * to convey the resulting work.
 */
package org.openhab.binding.homematic.internal.ccu;

import java.util.HashSet;
import java.util.Set;

import org.openhab.binding.homematic.internal.device.HMDevice;
import org.openhab.binding.homematic.internal.device.physical.HMPhysicalDevice;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This abstract implementation of the CCU interface implements CCUListener
 * related methods as well as suppor methods for subclasses to fire events.
 * 
 * @author Mathias Ewald
 * 
 * @param <T>
 */
public abstract class AbstractCCU<T extends HMPhysicalDevice> implements CCU<T> {

    private static final Logger logger = LoggerFactory.getLogger(AbstractCCU.class);

    private Set<CCUListener> listeners;

    public AbstractCCU() {
        listeners = new HashSet<CCUListener>();
    }

    @Override
    public void addCCUListener(CCUListener l) {
        if (listeners.add(l)) {
            logger.debug("CCUListener added");
        }
    }

    @Override
    public void removeCCUListener(CCUListener l) {
        if (listeners.remove(l)) {
            logger.debug("CCUListener added");
        }
    }

    protected void fireDeviceAdded(HMDevice device) {
        logger.debug("firing device added event to " + listeners.size() + " CCUListeners");
        for (CCUListener l : listeners) {
            l.deviceAdded(device);
        }
    }

    protected void fireDeviceRemoved(HMDevice device) {
        logger.debug("firing device removed event to " + listeners.size() + " CCUListeners");
        for (CCUListener l : listeners) {
            l.deviceRemoved(device);
        }
    }

}
